In this section, we deal with an approach to pointwise joint ergodicity which is based on the notion of disjointness of dynamical systems that was introduced by Furstenberg in [1]}. We remark that while in the previous sections we were mostly dealing with the maps of the interval, the main results in this section are quite general.
The reader is referred to the classical literature ([2]}, [3]}, [4]}, [5]}) for definitions of mixing notions which are mentioned in this section.
